Which measurement is critical for verifying alignment after suspension repairs?

The correct answer is SAI (Steering Axis Inclination), which is a critical measurement for verifying the alignment of the vehicle after suspension repairs. SAI refers to the angle formed between the steering axis and a vertical line when viewed from the front of the vehicle. It influences the vehicle's stability during steering and can affect tire wear and handling characteristics.

After suspension repairs, ensuring that the SAI is within specification is essential since any deviation can lead to negative impacts on vehicle performance. The alignment of the steering components directly influences how the vehicle tracks on the road and reacts during turns. Maintaining correct SAI helps ensure that steering response remains consistent and that the vehicle behaves predictably.

In the context of the other options, while camber, toe, and ride height are also important measurements in wheel alignment, SAI specifically addresses the alignment of the steering components, which is crucial after suspension repairs. Camber relates to the tilt of the wheels inward or outward from vertical, toe affects the angle at which the wheels point relative to the centerline of the vehicle, and ride height denotes the distance between the vehicle’s body and the ground, all of which are relevant for overall vehicle performance but not solely focused on steering alignment as SAI is.